Title :
Development of intermediate band solar cell based on ZnTe1−xOx synthesized by oxygen ion implantation
Author :
Tanaka, T. ; Yu, K.M. ; Levander, A.X. ; Dubon, O.D. ; Reichertz, L.A. ; Lopez, N. ; Nishio, M. ; Walukiewicz, W.
Author_Institution :
Dept. of Electr. & Electron. Eng., Saga Univ., Saga, Japan
Abstract :
Optical properties of ZnTe1-xOx (ZnTeO) and evidence for the photovoltaic (PV) activity of a ZnTeO intermediate band solar cell (IBSC) are reported. Electron transitions from the intermediate band to the conduction band were observed by photomodulated reflectance measurements. The optical absorption coefficients for the electron transition from the valence band to the intermediate band exceeds 2 × 104 cm-1, suitable for thin film PV device applications. The ZnTeO IBSC exhibits an enhanced spectral response below the bandedge of ZnTe, and all results are consistent with the proposed conversion mechanism of IBSC.
Keywords :
II-VI semiconductors; conduction bands; ion implantation; light absorption; reflectivity; semiconductor thin films; solar cells; tellurium compounds; valence bands; zinc compounds; IBSC; PV activity; ZnTe1-xOx; conduction band; electron transition; enhanced spectral response; intermediate band solar cell; optical absorption coefficient; optical properties; oxygen ion implantation; photomodulated reflectance measurement; photovoltaic activity; thin-film PV device applications; valence band; Absorption; Electron optics; Lighting; Optical films; Optical reflection; Photonics; Photovoltaic cells;
Conference_Titel :
Photovoltaic Specialists Conference (PVSC), 2011 37th IEEE
Conference_Location :
Seattle, WA
Print_ISBN :
978-1-4244-9966-3
DOI :
10.1109/PVSC.2011.6186368
